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"""Enums for DAG serialization."""

from enum import Enum, unique


# Fields of an encoded object in serialization.
@unique
class Encoding(str, Enum):
    """Enum of encoding constants."""
    TYPE = '__type'
    VAR = '__var'


# Supported types for encoding. primitives and list are not encoded.
@unique
class DagAttributeTypes(str, Enum):
    """Enum of supported attribute types of DAG."""
    DAG = 'dag'
    OP = 'operator'
    DATETIME = 'datetime'
    TIMEDELTA = 'timedelta'
    TIMEZONE = 'timezone'
    RELATIVEDELTA = 'relativedelta'
    DICT = 'dict'
    SET = 'set'
    TUPLE = 'tuple'
